WILLAS
MMBT3906LT1
TYPICAL AUDIO SMALL–SIGNAL CHARACTERISTICS
NOISE FIGURE VARIATIONS
(V
CE
= – 5.0 Vdc, T
A
= 25°C, Bandwidth = 1.0 Hz)
12
SOURCE RESISTANCE= 200Ω
10
14
f = 1.0 kHz
12
I
C
= 1.0 mA
NF, NOISE FIGURE (dB)
SOURCE RESISTANCE= 200
Ω
I
C
= 0.5 mA
SOURCE RESISTANCE =1.0kΩ
I
C
= 50
µA
I
C
= 1.0 mA
I
C
= 0.5 mA
NF, NOISE FIGURE (dB)
8
10
8
6
4
2
0
6
4
I
C
= 50
µA
I
C
= 100
µA
2
SOURCE RESISTANCE= 500Ω
I
C
= 100
µA
0.1
0.2
0.4
1.0
2.0
4.0
10
20
40
100
0
0.1
0.2
0.4
1.0
2.0
4.0
10
20
40
100
f, FREQUENCY (kHz)
R
g
, SOURCE RESISTANCE (kΩ)
Figure 7. Noise Figure
Figure 8. Noise Figure
h PARAMETERS
(V
CE
= 10 Vdc, f = 1.0 kHz, T
A
= 25°C)
h
oe
, OUTPUT ADMITTANCE (
µmhos)
0.1
0.2
0.3
0.5
1.0
2.0
3.0
5.0
10
300
100
50
200
h
fe
, DC CURRENT GAIN
20
10
100
70
50
5
2
1
0.1
0.2
0.3
0.5
1.0
2.0
3.0
5.0
10
30
I
C
, COLLECTOR CURRENT (mA)
I
C
, COLLECTOR CURRENT (mA)
Figure 9. Current Gain
20
10
Figure 10. Output Admittance
h
re
, VOLTAGE FEEDBACK RATIO (X 10
–4
)
10
7.0
5.0
h
ie
, INPUT IMPEDANCE (kΩ)
5.0
3.0
2.0
2.0
1.0
1.0
0.7
0.5
0.1
0.2
0.3
0.5
1.0
2.0
3.0
5.0
10
0.5
0.2
0.1
0.2
0.3
0.5
1.0
2.0
3.0
5.0
10
I
C
, COLLECTOR CURRENT (mA)
I
C
, COLLECTOR CURRENT (mA)
Figure 11. Input Impedance
Figure 12. Voltage Feedback Ratio
WILLAS [ WILLAS ELECTRONIC CORP ]
